Medium, Β onΒ  Linux,Β Networking Submissions: 21/75

Much like in the socat challenge, you need to make an already running service available on a different port. However, this time you'll have to use the nc command.

There is an HTTP service listening on port Your task is to map this address to You're not allowed to change the service configuration or restart it.

Port forwarding with a user-space proxy (socat, netcat, etc.)

Hint 1 πŸ’‘

netcat is a versatile networking utility that, in particular, can be used to start a listening TCP socket.

Hint 2 πŸ’‘

Unlike socat, netcat doesn't have a built-in proxy mode where connections are accepted on one port and forwarded to another. However, with netcat you can perform arbitrary commands upon receiving a connection. The data received from the client will be forwarded to the stdin of such command.

Hint 3 πŸ’‘

netcat can also be used to connect to a TCP socket and forward data from the stdin.

Hint 4 πŸ’‘

How about combining the two previous hints? πŸ˜‰

Hint 5 πŸ’‘

Not every version of netcat supports staying listening for another connection after its current connection is completed. If the -k option is not available, you'll have to be a bit more creative.

Hint 6 πŸ’‘

Use the force a bash loop, Luke! πŸš€

Categories:Β Linux,Β Networking
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